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Home >> Lexus >> 2004 >> SC 430 V8-4.3L (3UZ-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Alarm Module >> Testing and Inspection >> Engine Immobilizer System
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Engine Immobilizer System

TERMINALS OF ECU

Terminals Of ECU/Pinouts - Inspect Theft Warning ECU:




1. INSPECT THEFT WARNING ECU




a. Disconnect the the T7 ECU connector, and check the voltage or continuity between each terminal of the wire harness side connector.

If the result is not as specified, the wire harness side may malfunction.




b. Reconnect the T7 ECU connector, and check the voltage between each terminal of the connector.

If the result is not as specified, the T7 ECU may malfunction.

Terminals Of ECU/Pinouts - Inspect Transponder Key ECU:




2. INSPECT TRANSPONDER KEY ECU




a. Disconnect the the T13 ECU connector, and check the voltage or continuity between each terminal of the wire harness side connector.

If the result is not as specified, the wire harness side may malfunction.




b. Reconnect the T13 ECU connector, and check the voltage between each terminal of the connector.

Oscilloscope Waveform Part 1:




Oscilloscope Waveform Part 2:




c. Inspection using on oscilloscope

Terminals Of ECU/Pinouts - Inspect ECM:




3. INSPECT ECM




a. Disconnect the the E3, E5 and E6 ECU connectors, and check the voltage or continuity between each terminal of the wire harness side connectors.

Oscilloscope Waveform Part 1:




Oscilloscope Waveform Part 2:




b. Inspection using an oscilloscope.

If the result is not as specified, the T13 ECU may malfunction.
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